Lifting-jack.



A. G. OLSON.

LIPTING JACK.

APPLICATION IILED MAY 6, 1911.

1,049,906, Patented Jan. 7, 1913.

WITNESSES: 6/ /6 IN VEN TOR A TTORNE Y mnrn sTArs ran rrrca.

AXEL G. OLSON, OF TWO HARBORS, MINNESOTA.

LIFTING-JACK.

T 0 all whom it 721 ay concern:

Be it known that I, AxnL G. OLSON, a citizen of the United States,residing at Two Harbors, in the county of Lake and State of Minnesota,have invented certain new and useful Improvements in Lifting- Jacks, ofwhich the following is a specification, reference being had therein tothe accompanying drawing.

My invention relates to improvements in lifting jacks, and pertainsparticularly to jacks for lifting journal boxes of railroad cars.

The object of my invention is to provide a jack of this character inwhich the journal box may be raised for replacing the brasses, and inwhich said liftin operation is caused by the movement of the car.

Another object of my invention is to provide a jack of this character inwhich the car wneel is held down upon the rail and in which the movementof the car for raising the jack is not limited as in devices of thischaracter now in use.

A still further object of my invention is to provide a more simple,cheap and effective jack which can be readily applied to any of the carsnew in use, and having certain details of structure hereinafter setforth.

In the accompanying drawings Figure 1 is a side elevation of a car wheeland its journal box with my improved jack ap plied, and Fig. 2 is avertical sectional view taken on the line 22 of Fig. 1.

Referring now to the drawing, 1 represents the car wheel which is of theordinary type now in use on railroads, and 2 the axle upon the outer endof which are mounted the bearing brasses 3, the same being housed withinthe journal boxes 4 and through which it is applied or removed as thecase may be, all of which is of the ordinary form now used on railroadcars.

5 represents a cam-shaped member pivotally connected at 6, betweenthelugs 7 carried by a clamp 8. This clamp 8, as shown, is composed of ahooked end 9 engaging one side of the journal box and a screwthreadedsocket 10 through which a screw 11 passes and operated by a crank 12.The inner end of said screw carries a block 13, which is adapted toengage the opposite face of the journal box and firmly lock the clamp tothe lower face of the journal box.

The camshaped member 5, as heretofore Specification of Letters Patent.

Application filed May 6, 1911.

Patented Jan. '7, 1913.

Serial No. 625,544.

stated, is pivotally connected between the ears 7, by means of a pin 6.The upper end of said camshaped member extends up and engages the lowerface of the clamp so that the weight is not upon the pin 6 but is uponthe upper edge of the cam-shaped member, thus forming a wide bearingsurface for the cam. The lower end of the cam-shaped member isbifurcated, forming the two bearing surfaces 1% and 15, whereby thedevice may be used upon the wheels on either side of the car. The saidcam-shaped member 5 has a radius 16, greater than the distance 17between the pivot 6 thereof and the tread 1 of the wheel, and ispreferably a distance greater than what is necessary to raise thejournal box in order to remove the brasses.

lVhen the ack is placed as shown in Fig. l of the drawing, the car wheelis revolved toward the cam by the movement of the car, the bearingsurface of the latter will contact the inner wall of the tread 1 of thewheel and travel thereupon, and as the radius increases as it travels,the journal box must necessarily be raised. If the revolution of thewheel continue-s and the cam influence is sufficient to raise thejournal box beyond its limit, the radius 16 of the cam being greaterthan the distance 17 between the pivot G and the lower end of the cam,the wheel and box will become fixed and held against further rotation.This, as will be understood, allows the car to be moved a varieddistance and yet raise and hold the journal raised, so that the brassesmay be removed.

I am aware that segmental-shaped jacks have been used for liftingjournal boxes, but they have always been made to lift from the road-bed,and when the journal box is so lifted it always results in lifting thecorner of the car sufficient to throw an additional weight upon theopposite end of the axle, which results in the car wheel adjacent thebox being lifted, rising with the box at the same time. This, as readilyseen, will prevent the brasses from being moved till the wheel is helddown by some other means, while my device is expressly designed to holddown the wheel and lift the journal box simultaneously.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. The combination with a car wheel and its journal box, of a removablecam-shaped member pivot-ally carried by the journal box intermediate thejournal box and the inner wall of the wheel tread, whereby in revolvingthe wheel the journal box is raised and the wl'ieel held in its downwardposition.

2. The combination with a car wheel and its journal. box, of a cammember pivotally carried by the journal box and engaging the wheelwhereby the journal box is raised and the wheel locked thereto by therotation of the wheel in one direction.

3. The combination of a car wheel and its journal box, of a cam-shapedmember pivotally attached to the journal box and ei'igaging the innerwall of the tread of the wheel, whereby the revolving of the wheelraises the journal box and locks the wheel thereto against rotation.

l. -The combination with a car wheel and its journal box, of acam-shaped member removably and pivotally secured to the journal box andengaging the inner wall of the tread of the wheel, whereby the revolving of the wheel raises the journal box and locks the wheel theretoagainst rotation.

The combination with a car wheel and its journal box, of a cam-shapedmember remo *ably and pivotally secured to the journal box and having abifurcated lower end, one member of which engages the in ner wall of thetread of the wheel whereby the revolving of the wheel raises thejourna]. box and locks the wheel thereto against rotation.

6. The combination of a car wheel and its journal box, of a memberpivotally secured to the ournal box and having a bifurcated end, one endof which engages the inner wall of the tread of the wheel, whereby therevolving of the wheel raises the journal box and locks the same to thewheel.

7. The combination with a car wheel and its journal box, of a clampsecured to the journal box, lugs carried by said clamp, a cam-shapedmember pivoted between said lugs and having its lower end engaging theinner wall of the tread of the wheel, whereby the revolving of the wheelraises the journal box and looks the wheel against rotation.

S. The combination with a car wheel and its journal box, of a clampsecured to the journal box, a cam-shaped member pivoted to said clampand having its lower end e11- gaging the inner wall of the tread of thewheel the distance between the pivotal connection of the cam-shapedmember and the inner wall of the tread of the wheel being less than. thegreatest radius of the camshaped member.

9. A device of the character described, a clamp having a set screw forsecuring it to the journal box of a car, lugs carried by the lower faceof said clamp, a oam-shaped member pivoted between said lugs and havinga bifurcated lower end, one prong of which engages the inner wall of thetread of the wheel, substantially as shown and described.

in testimony whereof I hereunto atlix my signature in the presence oftwo witnesses.

AXEL G. OLSON.

lVitnesses EMIL NnLsoN, J 011x P. PAULsoN.

Copies of this patent may be obtained for five cents each, byaddressing; the Commissioner of Patents, Washington, D. C.

